1620912 has 20 divisors (see below), whose sum is σ = 4187480. Its totient is φ = 540288.

The previous prime is 1620893. The next prime is 1620917. The reversal of 1620912 is 2190261.

It is not an unprimeable number, because it can be changed into a prime (1620917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16837 + ... + 16932.

It is an arithmetic number, because the mean of its divisors is an integer number (209374).

2^1620912 is an apocalyptic number.

1620912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1620912 is an abundant number, since it is smaller than the sum of its proper divisors (2566568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620912 is a wasteful number, since it uses less digits than its factorization.

1620912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33780 (or 33774 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1620912 is about 1273.1504231630. The cubic root of 1620912 is about 117.4680643555.

The spelling of 1620912 in words is "one million, six hundred twenty thousand, nine hundred twelve".